map digitization

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Subject

Author

Date

map digitization

undertakerthedeadman@gmail.com

03-29-2007

willem van deur...

ujaval@gmail.co...

undertakerthede...

ujaval@gmail.co...

dsl

Posted by undertakerthedeadman@gmail.com on March 29, 2007, 1:07 pm

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Hello,

I am student of BS(IT) and doing my final project on tracking and MIS
system ,to display the position on map i want to use the Longitude /
Latitude coordinate system.I have scanned the map it has longitude and
latitude lines on it I want to digitize it such that it look like
google maps and i could use it in vb.net any help in this regard is
needed can any body tell me how to digitize it and then track
coordinates on to it

thanking in advance

Posted by willem van deursen on March 30, 2007, 4:03 am

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undertakerthedeadman@gmail.com wrote:

> Hello,

> I am student of BS(IT) and doing my final project on tracking and MIS

> system ,to display the position on map i want to use the Longitude /

> Latitude coordinate system.I have scanned the map it has longitude and

> latitude lines on it I want to digitize it such that it look like

> google maps and i could use it in vb.net any help in this regard is

> needed can any body tell me how to digitize it and then track

> coordinates on to it

> thanking in advance

Hello

What do you mean by 'digitize the map'. Do you want to have the line
elements as they appear on your scanned image? If so, you need a raster
to vector conversion. Examples of this can be found at
http://www.wintopo.com/ or at http://www.ablesw.com/r2v/

Or, do you want to have a coordinate system attached to your image, so
that you can map your coordinates on it. In that case, you need to
georeference your image (image rectification). In this process, you
create a so-called worldfile which contains the real-world coordinates
of the corner points of your image. From here, using a mathematical
relation, each location in your image can be converted to a real-world
coordinate and vise versa. Again, several tools can help you, see for
example http://www.tatukgis.com/products/AIC/aic.aspx

Hope this helps

Willem

Willem van Deursen, The Netherlands
wvandeursen_nospam@nospam_carthago.nl
replace _nospam@nospam_ for @ to get a valid email address
www.carthago.nl

Posted by ujaval@gmail.com on March 30, 2007, 4:14 am

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On Mar 29, 10:07 pm, "undertakerthedead...@gmail.com"

> Hello,

> I am student of BS(IT) and doing my final project on tracking and MIS

> system ,to display the position on map i want to use the Longitude /

> Latitude coordinate system.I have scanned the map it has longitude and

> latitude lines on it I want to digitize it such that it look like

> google maps and i could use it in vb.net any help in this regard is

> needed can any body tell me how to digitize it and then track

> coordinates on to it

> thanking in advance

Try QGIS. (qgis.org ) It's free and open-source.

You first need to 'georeference' the scanned map. This should be
straightforward as you will have coordinate information on the paper
map. Then use the QGIS tools for digitizing ( i.e. tracing the roads
on top of the scanned map ). The QGIS manual (
http://download.qgis.org/doc/userguide.pdf
) will guide you through the process.

Now you have digital data ( i.e. a shapefile ) of roads or other
features digitized from the image. You can use the free and open-
source Mapwindow ActiveX control (http://www.mapwindow.com/
mapwingis.php) to access this data from VB.

-Ujaval Gandhi
http://gisindia.blogspot.com

Posted by undertakerthedeadman@gmail.com on April 8, 2007, 6:09 am

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> On Mar 29, 10:07 pm, "undertakerthedead...@gmail.com"

> > Hello,

> > I am student of BS(IT) and doing my final project on tracking and MIS

> > system ,to display the position on map i want to use the Longitude /

> > Latitude coordinate system.I have scanned the map it has longitude and

> > latitude lines on it I want to digitize it such that it look like

> > google maps and i could use it in vb.net any help in this regard is

> > needed can any body tell me how to digitize it and then track

> > coordinates on to it

> > thanking in advance

> Try QGIS. (qgis.org ) It's free and open-source.

> You first need to 'georeference' the scanned map. This should be

> straightforward as you will have coordinate information on the paper

> map. Then use the QGIS tools for digitizing ( i.e. tracing the roads

> on top of the scanned map ). The QGIS manual

(http://download.qgis.org/doc/userguide.pdf

> ) will guide you through the process.

> Now you have digital data ( i.e. a shapefile ) of roads or other

> features digitized from the image. You can use the free and open-

> source Mapwindow ActiveX control (http://www.mapwindow.com/

> mapwingis.php) to access this data from VB.

> -Ujaval Gandhihttp://gisindia.blogspot.com

Hello bro I m not getting how to load the raster map in QGIS any help
on this and further on tiling like google

Posted by ujaval@gmail.com on April 9, 2007, 9:18 am

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On Apr 8, 3:09 pm, "undertakerthedead...@gmail.com"

> > On Mar 29, 10:07 pm, "undertakerthedead...@gmail.com"

> > > Hello,

> > > I am student of BS(IT) and doing my final project on tracking and MIS

> > > system ,to display the position on map i want to use the Longitude /

> > > Latitude coordinate system.I have scanned the map it has longitude and

> > > latitude lines on it I want to digitize it such that it look like

> > > google maps and i could use it in vb.net any help in this regard is

> > > needed can any body tell me how to digitize it and then track

> > > coordinates on to it

> > > thanking in advance

> > Try QGIS. (qgis.org ) It's free and open-source.

check instructions from here... let me know if you have questions.
make sure you are using QGIS 0.8

http://spatialthoughts.com/ossexamples/2007/02/digitizing-raster-data.html

-Ujaval

> > You first need to 'georeference' the scanned map. This should be

> > straightforward as you will have coordinate information on the paper

> > map. Then use the QGIS tools for digitizing ( i.e. tracing the roads

> > on top of the scanned map ). The QGIS manual

(http://download.qgis.org/doc/userguide.pdf

> > ) will guide you through the process.

> > Now you have digital data ( i.e. a shapefile ) of roads or other

> > features digitized from the image. You can use the free and open-

> > source Mapwindow ActiveX control (http://www.mapwindow.com/

> > mapwingis.php) to access this data from VB.

> > -Ujaval Gandhihttp://gisindia.blogspot.com

> Hello bro I m not getting how to load the raster map in QGIS any help

> on this and further on tiling like google

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